I am a 72 yr. old man . I take med s for blood pressure. My pressure is running 120 s over 65 to 70. my heart rate is running in the low 60 s and have even been down in the high 50 s. I walk three miles a day on my tread mill. sometimes when I am just sitting around doing nothing, my heart will act funny for about 2 or 3 second then I will feel light headed like I m going to pass out for a few seconds. Should I cut back on my med s? I don t recall ever having a heart rate above 100 since I started walking.